Rock Shox Reba RLT Tunning Help...

I just bought a 2011 Spec Epic Comp 29er. I have the + and - air chambers both set to 120 psi and the compresion tune set about 10 clicks from fastest setting. I'm a bit confused with the blue compression dial and floodgate dial though. I'm assuming the blue compression dial is to adjust the speed of the compression, how fast the shock compresses when hitting a bump, correct? If not please enlighten me. As far as the flood control knob goes I have no idea what this adjustment is for, someone please help. The fork manual that came with the bike doesn't give any tunning instructions and I can't find anything on the website. I've always owned fox rl forks before so these tunning options are different for me. thanks!